AWS DevOps Engineer Professional Practice Test

Which of the following services allows you to run code without provisioning or managing servers?

1. AWS Lambda

2. AWS EC2

3. AWS ECS

4. AWS CodeDeploy

The correct answer is: AWS Lambda

AWS Lambda is the service that enables you to run code without the need to provision or manage servers. This approach is often referred to as serverless computing. With AWS Lambda, you simply upload your code, and the service automatically handles the execution, scaling, and infrastructure management. This frees developers from the operational overhead associated with server management, allowing them to focus on writing code and developing applications. In addition, AWS Lambda operates based on events. It can execute your code in response to specific triggers such as database changes, HTTP requests through API Gateway, or queue messages from services like SQS. This event-driven model enables a highly scalable and efficient execution of applications. Other services, like AWS EC2 and AWS ECS, require you to manage servers—whether virtual machines in EC2 or containers in ECS. AWS CodeDeploy focuses on deployment and does not provide a code execution environment like Lambda. Thus, AWS Lambda stands out for its serverless capability, making it the correct answer for executing code without managing underlying servers.